I just happen to have a Stronglight bottom bracket with 118mm spindle and 1.37 x 24 cups. I don't suppose you have a 1st generation Dura-Ace headset?

W.O. Bentley.He came down out of his office one day to figure out why things were held up on the floor and it was due to the lack of the correct size nut. While the crew watched he made one by hand and by eye with a file and went back to hiss office without a word. One of the machinists checked it out later and it was perfect.

thanks, everyone.
pls don't worry much. not willing to file anything at all, for sure.
it was just out of curiosity in my case.

the spindle i need, at the moment, is 109 for english bb. most likely a pista size.
(sorry don't kill me here, this project is a single speed. did i say that?)
look like i will keep looking the campy family. will definitely check the bicycleclassic too.
nothing was there last time i checked.

thanks for advice, everyone!